Title :
Development of diamond windows for traveling wave tube harmonic amplifier in terahertz
Author :
Lili Li ; Mingqing Ding ; Jun Cai ; Yinghua Du ; Xianping Wu ; Jinjun Feng
Author_Institution :
Nat. Key Lab. of Sci. & Technol. on Vacuum Electron., Beijing Vacuum Electron. Res. Inst., Beijing, China
Abstract :
The traveling wave tube (TWT) harmonic Amplifier in terahertz (THAT) proposed in this laboratory is a novel TWT amplifier which can be used for high-power and wide-band THz vacuum radiation sources. One of the key components of THAT is the microwave window. This paper presents design and fabrication of the harmonic output window. The results of the diamond window indicated a transmission loss (S21) below 1.1dB, and VSWR ≤ 1.45 from 175 to 185 GHz. The THAT with the diamond window achieved a maximum saturated harmonic output power of 500mW with conversion gain of 28dB.
Keywords :
diamond; submillimetre wave amplifiers; travelling wave amplifiers; THAT; TWT harmonic amplifier in terahertz; VSWR; conversion gain; diamond windows; frequency 175 GHz to 185 GHz; gain 28 dB; harmonic output window; microwave window; power 500 mW; saturated harmonic output power; transmission loss; traveling wave tube harmonic amplifier; wide-band THz vacuum radiation sources; Diamonds; Fabrication; Harmonic analysis; Microwave amplifiers; Propagation losses; Solid modeling; diamond window; harmonic amplifier; transmission loss;
Conference_Titel :
Vacuum Electronics Conference (IVEC), 2015 IEEE International
Conference_Location :
Beijing
Print_ISBN :
978-1-4799-7109-1
DOI :
10.1109/IVEC.2015.7223883
